Cell Tech
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The evolution of cell phones. Past, Present, and the Future. |
Cell Phones
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Since phones have been invented, they have evolved in many ways, which eventually became the common cell phone that we know of today. In 1946, the first commercial mobile telephone service was created. Later, in 1962, Cellular technology demonstrated to the united states federal communications commission. In 1978, the first... |
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Software developers are currently designing applications to work with third-generation and fourth-generation technologies. The new technology will enable mobile phones to be a combined camera, video camera, computer, stereo and radio. Research and development of smaller digital base stations and terminal equipment has improved... |
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When you turn on your cell phone, it searches for an SID which is a unique 5 digit number that is assigned to each carrier by the FCC. The SID is searched for on the control channel which is a special frequency that the phone and base station use to talk to one another about call set up and channel changing. The phone shows a no service message when it can’t find any control cannels and... |
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Cell Phones of the Past |
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Cell Phones of the Present |
Cell Phones of the Future
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Cell phones are two-way radios. When you talk into a cell phone, it picks up your voice and converts the sound to radio waves. The radio waves travel through the air until they reach a receiver at a nearby base station. The base station then sends your call through the telephone network until it reaches the person you are calling. When you receive a call on your wireless telephone, the message travels through the telephone network until it reaches a base station close to your wireless phone. Then the base... |